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1785-L80E

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Allen-Bradley 1785-L80E is a 100 K-word PLC-5/80E controller with legacy AUI Ethernet, two configurable DH+ or Remote I/O channels, and serial communication.
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Technical specifications for 1785-L80E

  • Manufacturer:
    Allen-Bradley
  • Part Number:
    1785-L80E
  • Product Family:
    PLC-5
  • Product Type:
    PLC-5/80E Ethernet Programmable Controller
  • Stock:
    1
  • Maximum user memory:
    100 K words
  • Maximum total I/O:
    3,072 any mix or 3,072 inputs plus 3,072 outputs complementary
  • Communication channels:
    2 DH+ or Remote I/O; 1 serial; 1 Ethernet
  • Ethernet interface:
    TCP/IP, 15-pin AUI transceiver port
  • Maximum I/O rack addresses:
    24 (0…27 octal)
  • Maximum I/O chassis:
    65 total; 64 remote
  • Total data-table space:
    64 K words
  • Maximum program file:
    56 K words
  • Maximum data-table file:
    32 K words
  • Backplane current:
    3.6 A
  • Heat dissipation:
    65 BTU/h
  • Operating temperature:
    0…60 °C
  • Storage temperature:
    -40…85 °C
  • Relative humidity:
    5…95%, noncondensing
  • Battery:
    1770-XYC
  • Chassis position:
    Left-most slot in a supported 1771 chassis
  • Weight:
    1.38 kg
  • Estimated shipping dimensions:
    4.8 x 15.2 x 27.3 cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals AUI Estate Access 100 K Allocation Sixty-Four Racks Product Applications

Features:

  • 100 K-word Ethernet PLC: high-capacity control with defined program and data limits
  • Large connected estate: up to sixty-four remote chassis and twenty-four rack addresses
  • Separated communication: AUI Ethernet plus two DH+/Remote I/O channels and serial
1785-L80E combines the largest Ethernet PLC-5 memory tier with a substantial but deliberately bounded 1771 rack estate.

Its Ethernet path does not replace the two configurable control-network channels; messaging, rack scanning, and DH+ duties remain distinct engineering resources.

Migration or recovery should preserve the transceiver chain, address and jumper, file allocation, rack ownership, revision, battery, and a validated project.
Apter Power can review the 1785-L80E AUI path, memory-file boundaries, channel evidence, and condition before coordination.
Allen-Bradley 1785-L80E PLC-5/80E Ethernet Programmable Controller Manuals, Datasheets, Links
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • Media chain: document the AUI transceiver, interconnect cable, network medium, and power arrangement.
  • Network identity: retain the hardware address label, jumper position, programmed IP, and routing record.
  • Acceptance layers: test link, controller access, messaging, and application traffic separately.
  • Controller memory: keep the complete application within 100 K words.
  • Internal ceilings: observe 64 K total data tables, 56 K program files, and 32 K data-table files.
  • Offline proof: validate file conversions and indirect references before production download.
  • Rack scope: govern octal addresses 0…27 and no more than sixty-four remote chassis.
  • Link partition: assign each rack to exactly one of the two configurable scanner channels.
  • Physical audit: verify rate, length, termination, and device count on each link despite remaining controller capacity.
  • High-capacity Ethernet PLC-5 control: connect a 100 K-word 1771 application to supervisory networks.
  • Large dual-link Remote I/O systems: distribute supported rack addresses across two scanner channels.
  • Legacy modernization staging: retain PLC-5 execution while documenting Ethernet, DH+, serial, and rack dependencies.
Description
Large connected 1771 estates can use 1785-L80E for 3,072 I/O in any mix across twenty-four octal rack addresses and sixty-five total chassis. Its two configurable network channels keep rack-scanning or DH+ duties separate from Ethernet messaging.

The Ethernet PLC-5/80E identity of 1785-L80E combines 100 K words, a 15-pin AUI transceiver interface, and serial communication. The AUI media chain, address label, and configuration jumper remain part of the installation rather than an integral RJ45 port.

Application recovery on 1785-L80E must preserve the internal memory hierarchy together with Series/Revision, both channel maps, battery state, and the validated archive. Overall controller capacity does not remove the separate program-file and data-table-file boundaries.
Revisions

Revision Part #

Also known as

1785-L80E Series C
1785-L80E/C, Series C, Revision U.2
1785-L80E Series D
1785-L80E/D, Series D, Revision L.2
1785-L80E Series E
1785-L80E/E, Series E, Revision K.2
1785-L80E Series F
1785-L80E/F, Series F, Revision A.2
Alternative Names
Allen-Bradley 1785-L80E Rockwell Automation 1785-L80E AB 1785-L80E 1785L80E 1785 L80E PLC-5/80E Ethernet Programmable Controller 1785-L80E
Technical notes
Before restoring 1785-L80E, prove both the AUI Ethernet chain and its internal memory layout. The controller has 100 K words, but only 64 K total data-table space, 56 K per program file, and 32 K per data-table file. Reconcile the two network-channel scan lists before enabling remote outputs.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Why can 1785-L80E exceed a program-file limit before using all 100 K words?
Keep each program file within 56 K words, each data-table file within 32 K words, and total data tables within 64 K; inspect the failing file rather than total memory alone.
How should the AUI network path for 1785-L80E be tested after a switch upgrade?
Verify the transceiver and interconnect cable, media compatibility, hardware address, jumper, IP settings, link indication, controller access, and application messages in sequence.
What must be checked before using all sixty-four remote chassis on 1785-L80E?
Reconcile racks 0…27 across both scanner channels, audit per-link rate, cable length, device count and termination, budget scan response, and stage output activation.
Can 1785-L80E replace 1785-L80B without reviewing the project?
No. Compare AUI Ethernet hardware, channel count and roles, rack limits, Series/Revision, file layout, and communication configuration; shared memory size does not establish a drop-in replacement.
What should maintenance record before updating firmware on 1785-L80E?
Capture Series/Revision, current firmware, AUI hardware address and jumper, IP configuration, channel modes, rack map, project checksum, battery, and a tested rollback image.
When does a 1785-L80E restoration require separate validation of both scanner channels?
Whenever racks are divided between the two configurable links. Restore one channel at a time, confirm its scan list and physical limits, then enable remote outputs only after both ownership maps agree.